The most recent GBD analysis has continued to identify ambient air pollution as one of the most important risk factors contributing to death and disability. Fine particle air pollution is the largest environmental risk factor worldwide, responsible for a substantially larger number of attributable deaths than other more well-known behavioral risk factors such as alcohol use, physical inactivity, or high sodium intake.
Exposure to household air pollution from burning of solid fuels was responsible for 2.6 million deaths and 77 million DALYs (4.7 % and 3.2% of the global totals, respectively) in 2016, with the highest burdens in Asia and sub-Saharan Africa. Although representing 4.7% of all deaths globally, household air pollution exposure accounts for substantially greater percentages of the worldwide mortality due to ischemic heart disease, stroke, lung cancer, LRIs, and COPD (see right panel of Figure 10)
For more: read: https://www.stateofglobalair.org/sites/default/files/soga-2018-report.pdf